Hi all I am sure this has been asked many times before, but I can't find the definitive answer on here. I am a newbie to the Z4, I have just bought an 03 2.5 which I will mainly be using in the summer. I will be changing the oil once a year but won't be doing many miles approx 3-5k. My question is can I use a decent fully synthetic oil ie Mobil 1 helix or similar maybe 5w 40 or 0w 40 non long life as it will be changed yearly? Do I have to use the exact spec or just decent oil ?
thanks in advance Steve
thanks in advance Steve